sdsdot

Computes a vector-vector dot product with double precision.

Description

The sdsdot routines perform a dot product between two vectors with double precision:

\mathrm{result} = sb + \sum_{i=1}^n X_i Y_i

API

Syntax

void sdsdot(queue &exec_queue,
   std::int64_t n,
   float sb,
   buffer<float,1> &x,
   std::int64_t incx,
   buffer<float,1> &y,
   std::int64_t incy, buffer<float,1> &result)

sdsdot supports the Host, CPU, and GPU devices.

Input Parameters

exec_queue

The queue where the routine should be executed.

n

Number of elements in vectors x and y.

sb

Single precision scalar to be added to the dot product.

x

Buffer holding input vector x. The buffer must be of size at least (1 + (n - 1)*abs(incx)). See ref:matrix-storage for more details.

incx

Stride of vector x.

y

Buffer holding input vector y. The buffer must be of size at least (1 + (n - 1)*abs(incxy)). See ref:matrix-storage for more details.

incy

Stride of vector y.

Output Parameters

result

Buffer where the result (a scalar) will be stored. If n < 0 the result is sb.